It is an energy company. When you call back they will say that they were trying to contact you for marketing purpose. The automated voice will also say that they will call you back. If you want to be put on their do not call list, press 1. It also thanks you. :-)

http://www.lowcostpower.com/about/verde-energy-usa-management.html

This number has called me 7 times in the last 3 days. I finally set it as spam in my phone and now it won't ring when they call. How ridiculous.

Got a call to how do I block these numbers

I just got a call from that number as well. No message. Thanks for the tip.

Called left no message.

they are selling cheaper electrical rates. I have asked them to stop calling my number, but they still call several times a day

Called & left no message.

I received a call on my cell and I did not recognize the number.  I returned the call and got a message from Verday(??) Energy Co.  The message said they'd call back later.  They give you the opportunity to be placed on their Do Not Call list by pressing "1" which I did.  Let's hope that's the end of it.

Left no message it doesnt ring when you call it back